Here's a 48 minute talk at Code Mesh London on the Apollo Guidance Computer. The first part is just historical background, but they get into a lot of nice (and at the time innovative) technical fiddly bits on the operation and design of the AGC.
As for my favorite bug: The AGC on the LM was programmed to interpret a certain signal from the landing radar that it had landed. Apparently there are just 3 craters on the moon that are shaped in a way that radar reflecting off of them would fool the LM's AGC into thinking it had landed, and shut off the engine prematurely.
There's a couple spots where the presenter misspeaks (I know: astonishing that such a thing could happen during a live presentation), but generally a really nice talk if the subject appeals to you.